Circles First Attempt

What is the formula for circumference of a circle given the diameter?

• C = π r
• C = 2 π r
• C = π d
• C = 2 π d

Tags

CCSS.7.G.B.4

If the area of a circle is 25 π in² , then the diameter is?

• 10 in
• 5 in
• 25 in
• pi in

Tags

CCSS.7.G.B.4

If the circumference of a circle is 22π , what is the diameter?

• 22 ft
• 11 ft
• π ft
• 0 ft

Tags

CCSS.7.G.B.4

If the area of circle is 100 π , find the radius of the circle.

• 10 π
• 10
• 50
• 50 π

Tags

CCSS.7.G.B.4

If you are given the diameter, how can you calculate the radius?

• Multiply the diameter by 2
• Divide the diameter by 2
• Add 2 to the diameter
• Subtract 2 from the diameter

Tags

CCSS.7.G.B.4